第18题: [填空题]Every country with a monetary system (of its own) has to have (some kind) of market (which) dealers can buy and sell in bills, notes and other forms of (short-term credit) card.
A. of its own B. some kind C. which D. short-term credit 参考答案:C改为in which 答案解析:原句应为dealers can buy and sell in the market。